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Observation of a broad structure in the pi(+)pi(-)J/psi mass spectrum around 4.26 GeV/c(2)
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BaBar Collaboration (Including: UNSPECIFIED). (2005) Observation of a broad structure in the pi(+)pi(-)J/psi mass spectrum around 4.26 GeV/c(2). PHYSICAL REVIEW LETTERS, 95 (14). -. doi:10.1103/PhysRevLett.95.142001 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.95.142001
Abstract
We study initial-state radiation events, e(+)e(-)->gamma(ISR)pi(+)pi(-)J/psi, with data collected with the BABAR detector. We observe an accumulation of events near 4.26 GeV/c(2) in the invariant-mass spectrum of pi(+)pi(-)J/psi. Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26 GeV/c(2) is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90 MeV/c(2), depending on the fit hypothesis.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | PHYSICAL REVIEW LETTERS | ||||
Publisher: | AMERICAN PHYSICAL SOC | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 30 September 2005 | ||||
Dates: |
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Volume: | 95 | ||||
Number: | 14 | ||||
Number of Pages: | 7 | ||||
Page Range: | - | ||||
DOI: | 10.1103/PhysRevLett.95.142001 | ||||
Publication Status: | Published |
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